25443251131 has 2 divisors, whose sum is σ = 25443251132. Its totient is φ = 25443251130.

The previous prime is 25443251083. The next prime is 25443251137. The reversal of 25443251131 is 13115234452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25443251131 - 2⁹ = 25443250619 is a prime.

It is a super-2 number, since 2×25443251131² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25443251093 and 25443251102.

It is not a weakly prime, because it can be changed into another prime (25443251137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12721625565 + 12721625566.

It is an arithmetic number, because the mean of its divisors is an integer number (12721625566).

Almost surely, 2^25443251131 is an apocalyptic number.

25443251131 is a deficient number, since it is larger than the sum of its proper divisors (1).

25443251131 is an equidigital number, since it uses as much as digits as its factorization.

25443251131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 31.

Adding to 25443251131 its reverse (13115234452), we get a palindrome (38558485583).

The spelling of 25443251131 in words is "twenty-five billion, four hundred forty-three million, two hundred fifty-one thousand, one hundred thirty-one".